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Finding the Fourth Proportional to 321.87, 483.08 and 177.69

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Solution

The fourth proportional to 321.87, 483.08 and 177.69 is: 266.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.87 : 483.08 = 177.69 : x
  2. Step 2: Convert to fraction form
    321.87/483.08 = 177.69/x
  3. Step 3: Cross multiply
    321.87x = 483.08 × 177.69
  4. Step 4: Simplify right side
    321.87x = 85,837.60
  5. Step 5: Solve for x
    x = 85,837.60/321.87
  6. Step 6: Final answer
    x = 266.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.